A honorific that can be pleasingly shortened to “cuz” for people needing a single syllable version.
In my family we title relatives as cousin when they might be very distant and another generation entirely so it’s an easy one for me to adopt.
Guy at the pyramids called after me “sir!” No response “maam!” No response, after a few seconds he tries again “cousin!” I think we’ve cracked it. There is a gender neutral honorific.